Use the table to answer the question.

Question

Can Swim Cannot Swim Totals
7th Graders 15 60
8th Graders 45
Totals 65 40 105
The table shows data for seventh and eighth graders who can and cannot swim. How would you construct the missing parts of the two-way table?

Answer 1

To calculate the missing parts of the two-way table, we can use the totals provided in the table.

For the 7th graders, we know that the total number is 105. From this total, we can subtract the number of 8th graders who can swim, which is 45. Therefore, the number of 7th graders who can swim is 105 - 45 = 60.

For the 8th graders, we know that the total number is also 105. From this total, we can subtract the number of 7th graders who can swim, which is 15. Therefore, the number of 8th graders who can swim is 105 - 15 = 90.

Now, we can fill in the missing parts of the two-way table:

Can Swim Cannot Swim Totals
7th Graders 15 60 75
8th Graders 90 45 135
Totals 105 105 210